Door-spring



(Model) 2 sne'ns-sneet 1.

W. OJDE LONG 8v.A. A. SGHRODER.

DOOR SPRING.

No. 253,851. Patented Feb. 21,1882.

INVENTORS ATTORNEY N. PETERS. Fnuwumo n her. Wnhington. D c.

(ModeL) l '2 Sheets-Sheep 2;

W. C. DE LONG. & A. A. SGHRODER.

DOOR SPRING.

No. 253,851. Patentd Feb. 21,1882

2 3:- u I 3B 7 E 9 H21. c fill l WITNESSES INVENTORS 4 ATTORNEY 7 UNITED STATES PATENT OFFICE.

WILLIAM 0. DE LONG AND ANSON A. SGHRODER, OF WARREN, ILLINOIS.

DOOR-SPRING.

SPECIFICATION formingpart of Letters Patent No. 253,851, dated February 21, 1882.

enable others skilled in the art to which it pertains to make and use it, reference being hadto the accompanying drawings, which form part of this specification.

Our invention relates to an improvement in door-springs, the object being to produce an article of .this character which will combine strength and durability, and which may be manufactured and supplied to the trade at a greatly-reduced cost.

With these objects in view our invention consists in the combination, with a spring consisting of a single piece of wire bent to form a central section having arms projecting from each end and coiled in spiral form, of a central 'core.or tube provided with flanged ends and a longitudinal slot.

In the accompanying drawings, Figure 1 is a viewin perspective of a door provided with a spring constructed in accordance with our invention and with a modification thereof. Fig. 2 is a .view of the wire which constitutes the spring before being coiled. Fig. 3 is a view thereof after coiling, and showing the tube inserted within the'coils. Fig. 4is aview of one form of tube which is inserted within the coils, and Fig. 5 is aview ofa clip.

Each of the springs shown in Fig. l of the drawings consists of a single wire bent to form two coils, A, terminating in rods-B,'which are subsequently crossed in such manner that the resilient force of one coil is in constant antagonism with that of the other. The wire constituting each spring is first bent to form the central section, 0, having wires projectin g from each end, which are coiled in opposite directions to form the approaching coils A. The uncoiled portions of rods B of the said wires are located in the same plane and extend in Application filed July 8, 1881. ModeL) The projecting wires of the central section, 0, may be either coiled around or withinit, the only difierence in the spring produced being that in the first case the said central section is located in the coils, while in the latter it connects themfrom theou'tside. The upper spring shown in Fig. 1 of the drawings is coiled in accordance with the first and the lower with the last-named method.

By crossing the rods, as shown in Fig. 1 of the drawings, the central section, 0, whether located within or without the coils, is twisted, thus adding a torsional strain to the force of the oppositely-acting coils and stiffening the spring. As the coils are of the same size, they will resist each other with equal power, and because of this equalization of force they will be less liable to be wrenched away from their fastenings than were it otherwise.

To give rigidity to the spring a hollow tube or core, E, is inserted within the two coils A. The said tube is provided at each end with outwardly-flarin g flanges F, which serve to retain it in position in the coils. One end, however, is not flanged until after the tube has been inserted in them. When the coils are wound around the central section, 0, the tube or core must be left unclosed or deeply grooved to receive the said section within it; but when the coils are themselves formed within said central section the opening or groove is unnecessary.

Instead of the tube E,a solid metallic or I from-a single piece'of wire, having an eye, G,

formed at each end, the portion of wire between the said eyes being bent to form a loop, the outer extremity of which is turned over to form two eyes, I, at right angles to the others, and through which the rods D are passed. The rods D, being turned in opposite directions from each other, enter the eyes of their respective clips, one from above and the other from below. This arrangement allows the springs to be readily attached to and detached from the door and door-jamb or other objects which it connects, at the same time forming a very secure fastening for it when in working adjustment.

We would have it understood that we do not limit ourselves to the exact construction shown and described, but hold ourselves at liberty to make such slight changes and alterations as fairly fall within the spirit and scope of our invention.

Having fully described our invention, what we claim as new, and desire to secure by Letters Patent, is-

WILLIAM CLARK DE LONG. L. s. ANSON A. SOHRODER. L. s.

Witnesses:

W. A. FORD, CHAS. E. DE LONG, E. R. CARR. 

